package workspace;

import java.util.*;

public class test11 {
    public static void main(String[] args) {
        //aeiou变成小写
        Scanner scanner = new Scanner(System.in);
        String str = scanner.next();
        StringBuilder res = new StringBuilder();
        Set<Character> set1 = new HashSet<>(Arrays.asList('a','e','i','o','u'));
        Set<Character> set2 = new HashSet<>(Arrays.asList('A','E','I','O','U'));

        for (int i = 0; i < str.length(); i++) {
            char ch = str.charAt(i);
            if(set1.contains(ch)){
                res.append(ch);
            }else if(set2.contains(ch)){
                res.append((char)(ch-'A'+'a'));
            }else if(ch>='a'&&ch<='z'){
                res.append((char)(ch-'a'+'A'));
            }else{
                res.append(ch);
            }
        }
        System.out.println(res.toString());

    }
}
